I will probably be working long and late today and may not be able to be home before Friday's early morning. Will Stardock let us get into the beta even tomorrow or is it mandatory that we "register" today? I'm looking forward to testing and helping Stardock and I really do not want to miss this opportunity.
Did you already pre-order the game? If yes, you don't have to do anything yet. They'll process your order at some point and you'll get an email. Once you get that email, tell Impulse to show beta versions, and Elemental will appear.
If you haven't pre-ordered, you need to do so. Only pre-orders get beta access.